GBP/USD bulls take a breather at the highest levels in 10 months, making rounds to mid-1.2500s heading into Friday’s London open.

In doing so, the Cable pair bears the burden of the overbought RSI conditions while reassessing the odds of a further upside. However, a clear upside break of the previous key resistance comprising multiple levels marked since April 04, around 1.2510-2500, keeps the GBP/USD bulls hopeful of refreshing the multi-month top.

In that case, the 61.8% and 78.6% Fibonacci Expansion (FE) of the pair’s moves between March 21 and April 10, respectively near 1.2555 and 1.2615, could gain the market’s attention ahead of May 2022 high of around 1.2665.

It’s worth noting, however, that the top line of a three-week-old rising megaphone trend widening chart formation, around 1.2690 by the press time, can restrict the GBP/USD pair’s upside past 1.2665

Alternatively, pullback moves need to provide a convincing break below the 1.2500 round figure to recall the intraday sellers.

Even so, the aforementioned megaphone’s lower line, close to 1.2395 by the press time, can challenge the bears before giving them control.

Should the GBP/USD price remains bearish past 1.2395, multiple levels marked since early March constitute 1.2180-70 and 1.2015-05 as the key support to watch.